How do I scroll to the bottom of all Facebook posts?
The user has a lot of posts and scrolling down causes the browser to hang or faceook.com - the use of RAM is growing, growing and is incredibly huge It can't process everything when the site uses about 2GB of total freezing faceebok-page.

So you're getting a total freeze on it?
Kind of surprised.
Don't use Facebook, so not sure how that works, particularly.
But every so often I'll hit some "never ending" vk.com page & (browser) didn't seem to have issue with that.

Not sure what domains Facebook throws in there, but you could use NoScript to limit what domains are allowed to use JavaScript there (which I suppose would be facebook.com & fbcdn.com [or whatever it might be] & have all else blocked), & see if that helps?

On vk there is a similar problem, especially on large walls, except that vk is much more functional and stable. It has the ability to enable "subpages" offset thanks to which it eliminates the processing of everything in memory, only partially, thanks to which it succeeds without a problem.